Upgrade to Pro — share decks privately, control downloads, hide ads and more …

A Perl Monger in the Ruby World

A Perl Monger in the Ruby World

@yapcasia 2012

Kentaro Kuribayashi

September 29, 2012
Tweet

More Decks by Kentaro Kuribayashi

Other Decks in Technology

Transcript

  1. ໾ׂ ͱͯ͠ ΰʔϧ Λୡ੒ ͍ͨ͠ɻͦΕ͸ ཧ༝ ͷͨΊͩ ໾ׂ ͱͯ͠ ΰʔϧ

    Λୡ੒ ͍ͨ͠ɻͦΕ͸ ཧ༝ ͷͨΊͩ ໾ׂ ͱͯ͠ ΰʔϧ Λୡ੒ ͍ͨ͠ɻͦΕ͸ ཧ༝ ͷͨΊͩ M V C
  2. package Controller::Cart; sub create { user->add_cart(params{book_id}); # ... } controllers

    package Controller::Follow; sub create { user->add_follow(params{user_id}); # ... } package Controller::Blog; sub create { user->add_post(params{text}); # ... } package Model::User; sub add_cart { # ... } sub add_follow { # ... } sub add_post { # ... } model Too many methods.
  3. “Slim Controller, fat model”, but it’s too fat to be

    a model. ࢀߟ http://lab.ursm.jp/blog/2012/09/17/sapporo-rubykaigi-2012/ Կ͕໰୊͔
  4. “We can translate use case scenarios into algorithms, just in

    time, as new senarios enter the business process. We encode these algorithms directly as role methods.”
  5. package Controller::Cart; sub create { my $res = Context::Cart->new( user,

    params{item_id}, )->call; # ... } controller package Context::Cart sub new { my ($class, $user, $item_id) = @_; $user->extend(“Role::Customer”); bless { user => $user, item_id => $item_id, }, $class; } sub call { my $self = shift; $self->{user}->add_cart( $self->{item_id} ); } { package Role::Customer; sub add_cart { ... } } context https://github.com/kentaro/Class-Extendable `$user->extend` is enabled by my experimental module, Class::Extendable.
  6. ໾ׂ ͱͯ͠ ΰʔϧ Λୡ੒ ͍ͨ͠ɻͦΕ͸ ཧ༝ ͷͨΊͩ ໾ׂ ͱͯ͠ ΰʔϧ

    Λୡ੒ ͍ͨ͠ɻͦΕ͸ ཧ༝ ͷͨΊͩ Data + Role context Data + Role ର ର